Steve Jobs gave me a place where I could say anything, but set it up with a default that gives him free advertizing every time I send a message, and now I'm giving him free advertizing every time I send a message.

I don't see the lack of proofreading as a flaw; if anything, mobile e-mails are better, because they're shorter and they get to the point. (The ideal e-mail may in fact be a tweet.) But giving Steve Jobs free advertizing is kind of a dumb move. Nothing against the guy, I love almost everything he does, but I think literally every single person who's ever sent me a "Sent from my iPhone" e-mail has had either a tech startup or an acting career to promote. You can in fact use that free advertizing space for yourself; it's kind of the norm nowadays.